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Faster, Better, Cheaper Search Engines | Math-Blog
Searching for documents and other items on the Web or computers is often tedious and time consuming. Time is money. Highly paid professionals spend hours, days, and even longer searching for information on the Web or computers. Most search today is done using key word and phrase matching, often combined with various ranking schemes for the search results. Occasionally more advanced methods such as logical queries, e.g. search for “rocket scientist” and NOT “space”, and regular expressions are used. All of these methods have significant limitations and often require lengthy human review and further manual searching of the search results.
Interview with Derrick Niederman, author of Number Freak | Math-Blog
In this interview we sit down with author and mathematician Derrick Niederman to discuss his engaging, recently published book about the first two hundred natural numbers, ‘Number Freak: From 1 to 200, The Hidden Language of Numbers Revealed’.
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Other than that, I deliberately went easy on the cult surrounding the number 23, for example, and left a bunch of numerology and religious interpretations for somebody else to ponder. That’s another book all by itself.
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When I started the book, 17 had the edge. First of all, “At 17” by Janis Ian is probably my favorite song of all time. It came out in 1975, which was my favorite music year of all time. (Perhaps I should have written it in 1975.) But 17 is famous in mathematics for Carl Friedrich Gauss’s famous straightedge-and-compass construction of a regular 17-gon, for the 17 “wallpaper” symmetries of the plane, and for the fact that if you connect 17 suitably spaced dots with a segment of red, blue, or green, you will automatically create a “monochromatic” triangle whose three vertices are among the original 17 dots. And nobody has yet created a solvable Sudoku puzzle with fewer than 17 original entries. How about that?
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Free Mathematics Books
Here is an alphabetical list of online mathematics books, textbooks, monographs, lecture notes, and other mathematics related documents freely available on the web. I tried to select only the works in book formats, "real" books that are mainly in PDF format, so many well-known html-based mathematics web pages and online tutorials are left out. Click here if you prefer a categorized directory of mathematics books. The list is updated almost on a daily basis, so, if you want to bookmark this page, use the button in the upper right corner. Here are the books:
13 Useful Math Cheat Sheets | Math-Blog
Cheat sheets can be very useful and make for great posters around your room. The following is a collection of 13 cheat sheets for several mathematical topics and programs:
Google Code Blog: Simple Graphics Calculator Using the Visualization API and the Scatterchart
Steve Aitken, a developer contributing to the Visualization Developer Group, created a simple graphics calculator for Javascript-supported math functions that plots functions using the Google Visualization Scatter Chart. Here is a screenshot of a simple calculation of -sin(2x):
Getting started with gnuplot | Math-Blog
gnuplot is an excellent scientific package for visualizing data and plotting functions. Despite its name, it has nothing to do with the GNU project, even though it’s Open Source and entirely free. This tool is very handy whenever you need to produce production quality graphics from a given data-set (or function). It is no wonder that in its 20+ years of existence, it’s been employed in all sorts of industries.
Linear Algebra Toolkit
This Linear Algebra Toolkit is comprised of the modules listed below. Each module is designed to help a linear algebra student learn and practice a basic linear algebra procedure, such as Gauss-Jordan reduction, calculating the determinant, or checking fo
Explaining algebraic theory with functional programs
Jeroen Fokker, Explaining Algebraic Theory with Functional Programs.
In: Functional Programming Languages in Education, Proceedings of the first international symposium FPLE'95 in Nijmegen, the Netherlands, december 1995. (Pieter Hartel and Rinus Plasmei
History of Mathematics Home Page
Every culture on earth has developed some mathematics. In some cases, this mathematics has spread from one culture to another. Now there is one predominant international mathematics, and this mathematics has quite a history. It has roots in ancient Egypt
Scientific Analysis in Python
I find Python very user-friendly. Therefore I often reach for it when tasked to solve small or large scripting problems. I have been rather frustrated, though, with the level of support for scientific analysis packages. With scipy and matplotlib, of cours
Evariste Galois
Biografia di Evariste Galois, matematico francese progenitore dell'omonima teoria
Factorization using the Elliptic Curve Method
Programma in Java che implementa l'algoritmo di Lenstra basato sulle curve ellittiche per la fattorizzazione di un numero come prodotto di primi
I migliori 100 teoremi della storia della Matematica
Lista dei migliori teoremi mai enunciati e dimostrati della storia della matematica.
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